Oblivion + Best Friend = Tears

A couple of days ago I went to my best friend's house and took my 360 and games with me, all was well. Last night he phoned me, with the heartstopping words, "Uh, Gerry...is there something wrong with your Oblivion?"On replying that, no, there isn't, he explained to me that it now refuses to load past 1/5th before giving a DDE but that the disc is in mint condition and clean. I don't know what happened, but I am very sad!

Apparently the batch I bought it from was a little on the dodgy side, but my disc was fine until now.

Ah well, it'll have to be Morrowind again, because I'm not forking out another 50 notes, no Sirree Bob.